Charles a



(No Model.)

0. A. KUNZEL; Jr! 1GB MAKING MACHINE.

Patented'Jan. 28, 1896.

UNTTED STATES PATENT QFFICE.

CHARLES A. KUNZEL, JR, on NEW YORK, N. Y.

ICE-MAKlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 553,681, dated January28, 1896.

Application filed May 15, 1894. Serial No. 511,320. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES A. KUNZEL, J11, a citizen of the UnitedStates, residing in the city, county, and State of New York, haveinvented a new and useful Improvement in Ice-Making Machines, whichimprovementis fully set forth in the following specification andaccompanying drawing.

My invention consists of improvements in ice-making machines, as will behereinafter set forth and pointed out in the claim that follows thespecification.

- In the figure in the accompanying drawing, which represents a partialside elevation and partial vertical section of an ice-machine embodyingmy invention, A designates a still, in the base of which is a jet-pipeB, which is connected with the supply-pipe O, the latter being providedwith the cock D, whose shell projects into the base of the still, theinner plug E of said cock being hollow and communicating with thesupply-pipe G and with the said pipe 13. ll designates a retort locatedwithin the shell of said still and above the said pipe B.

J designates an eduction pipe which is connected with the retort H andprovided with a safety-valve K, said pipe being attached to a pipe L,which is connected with the condenser M, from which latter leads thepipe N which is attached to the receiver P.

Q designates a pipe which leads from the receiver P and joins theexpansion-coils R within the freezing-tank S.

T designates an outlet-pipe of expansioncoils R, the same having one endconnected with the pipe U, which is inclosed in the pipe or chamber V,said pipe U being connected with the pipe TV, which enters and opensinto the lower part of the absorption-tank X, which latter contains thestrong liquor into which the pipe V dips.

Leading through the absorption-tank X is the pipe Y, which enters theheat-exchanger Z, extending to the lower part thereof, adjacent to theend of the pipe A, which latter leads from the retort H into saidexchanger Z, said pipe A having a cock B. A pipe 0 connected at one endwith the upper end of the heat-exchanger Z communicates with a branchpipe D, which is connected with the pipe Y in the absorption-tank andthe pipe Connected with the weak-water cooler G is Q a water-supply pipeL, which leads from a water-tank M, whereby the pipe H may be cooled bythe water admitted into the. said tank G, the latter being provided withan overflow-pipe N for discharging the water from said tank. The tank Mis supplied with water by means of the pipe D which is connected with asuitable pump or other source of supply.

Connected with the heat-exchanger Z is a pipe P which is connected withthe pump Q which also has a pipe R connecting it with the tank X.

S designates a pipe which is connected with the exchanger Z and providedwith the cock T, one end of said pipe entering the retort H.

T designates a pipe which extends from the tank Mto the condenser M forsupplying the latter with water.

U designates a pipe which extends from the tank M to the pipe or chamberV for supplyingthe latter with water and thereby aid in keeping thetemperature of the gas in pipe U within the same as low as possible, orlower than it would be if the said pipe U were exposed to theatmosphere. The said chamber V has an overflow-pipe V returning to thesaid tank M. The pipe V is provided with an overflow-cock V and the pipeQ has also an expansion-cock Q at or near its connection with theexpansion-coils R.

The operation is as follows: A chemical, such as aqua-ammonia, suitablefor making gas for freezing purposes is placed into the retort H, thegas generated therefrom passing through the dehydrator A and dischargingthrough the pipe L into the condenser M. The liquefied gas then passesthrough the pipe N into the receiver P, where said liquid gas iscollected and then passed through the pipe Q into the expansion-coils R,which are located in the freezing-tank S, Where the gas expands fromaliquefied condition into a gaseous state, as it is not under pressurein said pipes R, it being noticed that boxes are placed in saidfreezing-tank S and supplied with water, and as the latter is subjectedto the action of the gas-containing expansion-coils B it is frozen,forming blocks of ice. It will here he noticed that the tank S is filledwith a fluid mixture of alcohol and seasalt, and as the gas-containingpipes are within said fluid and cool the same it is evident that theboxes are subjected to the freezingaction of the fluid, whereby thewater in said boxes is frozen, thus forming the ice,' as has beenstated. The gas now enters the pipe T and then into the pipe U, andpasses out therefrom as expanded gas through the pipe into theabsorption-tank X, where it is absorbed by the weak liquor in said tank.The strong liquor in said tank is now pumped out through the pipe R bythe action of the pump Q into the pipe P and directed into the heatexchanger tank Z. Now, if this tank Z is full it will overflow throughthe pipe S into the retort H. It will be noticed that the water in thetank G cools the pipe II, and consequently the weak liquor in said pipe,in which condition said weak liquor enters the pipes J K, and isdischarged into the tank X, the strong liquor in the latter being pumpedout through the pipe R. Meanwhile the weak liquor by the high pressurein the retort I-I passes through the pipe A and cock 13 into theheat-exchanger tank Z. The heat carried by the chemical in the pipe Achanges the temperature in the tank Z by heating the strong liquortherein before it passes back to the still. The weak liquor in pipe Apasses through the pipe Y, through the tank X, and by the pipe F intothe cooling-tank G, in which a continual circulation of cold water flowsthrough pipes Land N, through pipe J into the tank X, from which it issucked in its original strength by the pump and forced through tank Zand pipe S back into the still. If the strong liquor foams too much inthe retort H, the cocks TFare closed and the cock E opened. Then thepump draws the strong liquor from the tank Z through the pipe 0 into thepipe D, and thence into the inlet pipe Hin the tank G,where it is cooledto a lower point than it would otherwise be, thus preventing the toosudden release of the gas upon entering the still, and from thence itmay be directed into the absorption-tank X, after which it may be pumpedout through the pipe R and directed into the heat-exchanger tank Z asbefore.

Having thus describcd my invention, what I claim as new, and desire tosecure by Letters Patent, is

The combination of an absorption ice ma chine, of a still, a condenser,expansion coils, and absorber,with a heat exchanger and weak watercooler, said exchanger having an overflow into the still for the strongliquor, and also having another overflow connected to the pipe leadingfrom the still to the weak water cooler and cocksin said overflows andpipe whereby the circulation of the weak Water through the cooler and ofthe strong liquor back to the still may be cut off and the strong liquorcirculated through the cooler,-whereby foaming is prevented when thesame is finally introduced into the still, substantially as described.

CHARLES A. KUNZEL, JR.

